我市位于四川盆地西北部,常年油菜种植面积120万亩左右,主要分布在丘陵及零星冲积平坝区,其中甘蓝型油菜面积占总油菜面积的80％以上。自1982年油菜单产达到120公斤后,连续9年处于徘徊局面。为此,我们针对我地湿度大,雾日多、光照差,冬干春旱的气候特点和油菜生产氮肥投入偏高,淹灌耗水量大,倒伏面积较多,菌核病逐年加重的问题,经过4年(1987～1990年)研究,总结出以增株减氮为核心的油菜高产稳产配套技术。即密度由每亩0.8万株左右提高到1.4～1.6万株,施氮量由每亩16公斤减少到12公斤左右。1989～1991年在川北、川西、川中累计推广223.0万亩,平均亩产155.9公斤,增收菜籽3141万公斤,经济效益达4711万元。 The city is located in the northwest of Sichuan Basin, perennial planting area of ​​about 1.2 million acres of rape, mainly in the hills and sporadic alluvial Pingba District, which accounted for more than 80% of the total canola area rapeseed area. Since 1982 rapeseed production reached 120 kg, 9 consecutive years in a hovering situation. To this end, we focus on my area of ​​humidity, fog and more, poor light, winter and dry climate characteristics of drought and rape nitrogen fertilizer into the production of high flooding irrigation water more lodging area more scleroderma year by year aggravating problem After 4 years (from 1987 to 1990), the research summarized the high-yield and steady-yielding techniques of rapeseed with increasing nitrogen as the core. In other words, the density increased from about 40,000 to about 1.4 to 16,000 plants per mu. The nitrogen application rate was reduced from 16 kg per mu to about 12 kg. From 1989 to 1991, a total of 2,230,000 mu were popularized in northern Sichuan, western Sichuan and Sichuan provinces, with an average yield of 155.9 kilograms per mu, an increase of 31.41 million kilograms of rapeseed and an economic benefit of 47.11 million yuan.